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Finding the Fourth Proportional to 197.78, 272.66 and 124.07

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Solution

The fourth proportional to 197.78, 272.66 and 124.07 is: 171.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.78 : 272.66 = 124.07 : x
  2. Step 2: Convert to fraction form
    197.78/272.66 = 124.07/x
  3. Step 3: Cross multiply
    197.78x = 272.66 × 124.07
  4. Step 4: Simplify right side
    197.78x = 33,826.94
  5. Step 5: Solve for x
    x = 33,826.94/197.78
  6. Step 6: Final answer
    x = 171.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.